But there was no such thing as unlisted telephone number then, so I can just look into the book and look his name up.

当时所有的电话号码都印在黄页上，只要翻黄页，就能查到他的电话。

Apparently, the phone company wants to start charging people for unlisted numbers.

电话公司想对不登记的人收费。

And I called up Bill Hewlett, cause he lived in Palo Alto, and there were no unlisted numbers in the phone book, which gives you a clue to my age.

Hewlett住在Palo Alto，13岁那年我给他打了个电话，年头所有的电话号码都印在大部头里，不好意思，暴露了我的年龄。